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Campbell Biology | 10th Edition | ISBN: 9780321775658 | Authors: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
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EVOLUTION CONNECTION A typical prokaryotic cell has about 3,000 genes in its DNA, while

Chapter 1, Problem 12

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QUESTION:

EVOLUTION CONNECTION A typical prokaryotic cell has about 3,000 genes in its DNA, while a human cell has almost 21,000 genes. About 1,000 of these genes are present in both types of cells. Based on your understanding of evolution, explain how such different organisms could have this same subset of 1,000 genes. What sorts of functions might these shared genes have?

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QUESTION:

EVOLUTION CONNECTION A typical prokaryotic cell has about 3,000 genes in its DNA, while a human cell has almost 21,000 genes. About 1,000 of these genes are present in both types of cells. Based on your understanding of evolution, explain how such different organisms could have this same subset of 1,000 genes. What sorts of functions might these shared genes have?

ANSWER:


Based on evolutionary principles, this similarity in genes likely derives from a common ancestor of both prokaryotic and human cells, which passed down its DNA code to both species. These shared 1,000 genes are likely involved in basic cellular processes that are es

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